<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <script src="https://cdn.jsdelivr.net/npm/vue@2.7.14/dist/vue.js"></script>
</head>

<body>
    <div id="app">
        <div>
            <h1>{{ message }}</h1>
            <button @click="change">逆转世界</button>
        </div>
    </div>
    <script>
        const app = new Vue({
            el: '#app',
            methods: {
                change() {
                    // 两种方法
                    // this.message = [...this.message].reverse().join('');
                    this.message = this.message.split('').reverse().join('');
                }
            },
            data: {
                message: "HELLO, WORLD"
            },

        })
    </script>
</body>

</html>